AM Broadcast RFI Kits

ZS6BKW Center Fed Antenna, 80-6 Meters, 500/1.5KW/5KW PEP rated - FREE shipping in USA

SKU PAL-ZS68006-500
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ZS6BKW Center Fed Antenna, 80-6 Meters, 500/1.5KW/5KW PEP rated - FREE shipping in USA
Product Details
Brand: Palomar Engineers
Frequency Band(s): 80-6
Country/Region of Manufacture: USA
Freq Range (MHz):: 3.5-54 Mhz
Power (PEP watts):: 500/1500/5000
Length (ft):: 88 feet Wire and 40 feet Ladder Line

Excellent features:

*** Covers 40-20-17-12-10 meter ham bands under 2:1 at most heights no tuner required, 80, 15, 6 meter bands require wide range tuner

*** Great digital/FT8 antenna on many bands without tuner

*** Low SWR on many bands or use antenna tuner

*** 500 watts/1.5KW/5KW PEP (SSB-ICAS) options

*** Stainless Steel hardware for long life

*** Halyard Hoist hole for ease of center support installation or hang at ends only

*** Insulated #14 wire for durability

*** High Strength insulators (may be black, white or gray)

*** Ladder Line to 1:1 Balun (Note 1500/5000 Watts CUBE Balun can be mounted to a wall, 500 watts MB-1-500 is supported by ladder line

Super convenient and quick – great for contest operation! Choose 500, 1500 or 5000 watt PEP (use 5KW model for digital modes over 1000 watts).


INSTALLATION

For best results support center at 30+ feet and ends over 15 feet. Angle of feed each side must be great than 45 degrees or 120 – 180 degrees total between each side preferred. Any length of 50 ohm feed line ok (from the matching unit) but longer feed lines over 50 feet may show reduced SWR on some bands due to losses in feed line and soil conductivity, nearby objects, etc. Due to local ground conditions, antenna height and feed line length, SWR may vary from samples shown and an antenna tuner may be required or some bands to bring SWR at end of feed line to acceptable levels.

Antenna Length Note:These antennas are shipped from the factory with each side at 46 feet long (92 feet total) so that you may adjust(shorten) the length for your personal installation.The SWR graph shown for this product is for a side length of 44 feet as this length provides a lower SWR in the 17 meter band than the 46 foot length. The longer 46 foot length tends to shift the SWR curves to the left (lower frequency) which can sometimes be offset by reducing the length of the ladder line (up to 2 feet max). Each antenna installation is unique – try the antenna lengths as received and shorten the wire length by bending back the wires on themselves at the ends as needed.

Use an antenna tuner for 80, 30, 15 meters and reduce power if balun saturation occurs.

FREE USA Shipping on orders over $100

Insulators may be black, grey or white depending on stock at hand when order is placed. Wire is stranded, AWG#14, insulated and black or grey color.



When considering solutions for AM broadcast (550 Khz – 1.8 Mhz) you should consider Mix 77 ferrites available in a variety of shapes and sizes.  Choose a size to give the maximum number of turns of the affected wire or cable.

AM broadcast transmits on a low frequency with large antennas.  Consequently it takes a large antenna to receive the signals.  Typical “antennas” are AC house wiring, phone lines, long satellite or cable TV cables, DSL/CAT5 lines running between rooms, etc.  The device wires that connect to these  “antennas” need to be choked with as many turns through the ferrite as possible.  Some installation examples are shown below on this page.

For AC/ DC power cords and coax cables the F240-77 (2.4″ OD, 1.4″ ID) “Donut” toroid is the most popular.  Also available are smaller toroid donuts and Mix 77 beads. Shown below is a graph with 8, 10, and 12 turns through the toroid – obviously more turns has higher choking impedance.  Mix 77 toroid products are HERE and Mix 77 small beads (for small wires) are HERE

F240 77 Turns Comparison 1024x648 - AM Broadcast RFI Kits

F240-77 Turns Comparison from .1 – 8.1 Mhz

Shown below is a graph of frequency response verses choking magnitude for a F240-77 in the AM Broadcast band for a 12 turn coil around the toroid. (Same info as above but different frequency range).

AM Band Choking Graph F240 77 1024x648 - AM Broadcast RFI Kits

F240-77 Choking Impedance in AM Broadcast Band

 

 

Typical Installations for Donut/Ring Toroids

20131210 114716 150x150 - AM Broadcast RFI Kits

AC Cable on F-240 Toroid – 6 turns

20131210 115137 150x150 - AM Broadcast RFI Kits

Ethernet Cable on F-240 Toroid – 7 turns

20131222 125533 150x150 - AM Broadcast RFI Kits

Audio or Mic cable on F240- 12 turns

 

 Extra Mix 75 Snap On Beads  HERE – VERY effective for AM Broadcast RFI